# SOLUTION: A radiator contains 9 quarts of fluid, 40% of which is antifreeze. How much fluid should be drained and replaced with pure antifreeze so that the new mixture is 55% antifreeze?

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 Question 511241: A radiator contains 9 quarts of fluid, 40% of which is antifreeze. How much fluid should be drained and replaced with pure antifreeze so that the new mixture is 55% antifreeze?Answer by josmiceli(9697)   (Show Source): You can put this solution on YOUR website!In words: ( final quarts of antifreeze) / ( final quarts of fluid ) = 55% Let = quarts of fluid to be drained and replaced with pure antifreeze given: = quarts of antifreeze in original mixture = quarts of antifreeze that is drained off ------------ 2.25 quarts of fluid should be drained and replaced with pure antifreeze check: OK